96 Restoration of Paralysed Muscles by Nerve Anastomosis. 



diminished strength, without reunion of the roots and without aiding the 

 recovery of function by anastomosis. 



4. In Macacus section of both fifth and sixth nerves almost entirely or 

 entirely paralyses the deltoid, but not entirely the flexors of the elbow or 

 the supinators, but in Man section of these two roots not only completely 

 paralyses the deltoid, but also the external rotators of the arm, the flexors 

 of the arm to such an extent at least that they cannot produce flexion, and 

 also the supinator brevis to such an extent that it cannot produce supination, 

 and in some cases also paralyses the extensors in the forearm. 



5. In Macacus, in order to paralyse completely not only the deltoid but 

 also the flexors of the elbow and the supinator brevis, it is necessary to 

 divide the fifth, sixth, and seventh nerves, as apparently more of the fibres 

 to the flexors of the elbow pass in the seventh nerve than in the case 

 of Man. 



6. In Macacus the paralysis resulting from section of the fifth and sixth 

 may be largely restored by anastomosis of the peripheral segments of the 

 two roots to the seventh cervical nerve, or to the spinal accessory, and the 

 resulting restoration of the muscles does not materially differ in date of 

 onset, in progress, or in ultimate result in the two cases. 



7. The time taken for restoration of function by means of anastomosis is 

 approximately the same in the case of the brachial plexus in Macacus, and 

 in the case of the limb nerves distal to the plexus in the Dog, and in the 

 case of the facial nerve in the Dog and in Macacus. 



Electrical Effects accompanying the Decomposition of Organic 

 Compounds. II. — Ionisation of the Gases produced during 

 Fermentation. 



By M. C. Potter, Sc.D., M.A., Professor of Botany in the University of 



Durham. 



(Communicated by Dr. A. D. Waller, F.R.S. Received February 26, 1915.) 

 [This paper is published in ' Proceedings,' Series A, No. 632 (vol. 91).] 



